Cross Reference: /external/grpc-grpc/examples/csharp/Helloworld/Greeter

`Name`	`Date`	`Size`
Up to higher level directory
`Greeter.csproj`	22-Oct-2020	`587`
`Helloworld.cs`	22-Oct-2020	`10K`
`HelloworldGrpc.cs`	22-Oct-2020	`7.4K`